Hi,

A few hours ago I posted a question about removing rust from a 1986
Craftsman table saw.

Well, I also got a band saw and a jointer... sorry.

The body of the band saw (I'm guessing it's made of steel, but maybe
something else) is covered with a substance that has has the consistency
of rust except it's completely white. It comes of completely with the
help of a wire brush. What is this stuff?

Thanks again,

Aaron